High school diploma or equivalent

None

Industrial machinery mechanics and machinery maintenance workers maintain and repair factory equipment and other industrial machinery, such as conveying systems, production machinery, and packaging equipment. Millwrights install, dismantle, repair, reassemble, and move machinery in factories, power plants, and construction sites.

High school diploma or equivalent

Less than 5 years

Aircraft Cargo Handling Supervisors coordinate and supervise the activities of ground crew in the loading, unloading, securing, and staging of aircraft cargo or baggage. They can determine the quantity and orientation of cargo and compute aircraft center of gravity, and also may accompany aircraft as member of flight crew and monitor and handle cargo in flight, and assist and brief passengers on safety and emergency procedures. This category includes loadmasters.

High school diploma or equivalent

None

Elevator and Escalator Installers and Repairers install, maintain, and fix elevators, escalators, moving walkways, and other lifts.

High school diploma or equivalent

None

Petroleum Pump System Operators, Refinery Operators, and Gaugers operate or control petroleum refining or processing units. They may specialize in controlling manifold and pumping systems, gauging or testing oil in storage tanks, or regulating the flow of oil into pipelines.

High school diploma or equivalent

Less than 5 years

First-line Supervisors of Mechanics, Installers, and Repairers directly supervise and coordinate the activities of mechanics, installers, and repairers. They can also advise customers on recommended services.

High school diploma or equivalent

None

Heavy vehicle and mobile equipment service technicians, also called mechanics, inspect, maintain, and repair vehicles and machinery used in construction, farming, rail transportation, and other industries.

High school diploma or equivalent

5 years or more

First-line Supervisors of Construction Trades and Extraction Workers directly supervise and coordinate activities of construction or extraction workers.

High school diploma or equivalent

Less than 5 years

Crane and Tower Operators operate mechanical boom and cable or tower and cable equipment to lift and move materials, machines, or products in many directions.

High school diploma or equivalent

None

Line installers and repairers, also known as line workers, install or repair electrical power systems and telecommunications cables, including fiber optics.

High school diploma or equivalent

None

Rail-track Laying and Maintenance Equipment Operators install, repair, and maintain track for standard or narrow-gauge railroad equipment used in regular railroad service or in plant yards, quarries, sand and gravel pits, and mines.

High school diploma or equivalent

None

Control and valve installers and repairers install, repair, and maintain mechanical regulating and controlling devices, such as electric meters, gas regulators, thermostats, safety and flow valves, and other mechanical governors.

High school diploma or equivalent

Less than 5 years

Explosives Workers, Ordnance Handling Experts, and Blasters place and detonate explosives to demolish structures or to loosen, remove, or displace earth, rock, or other materials. They may perform specialized handling, storage, and accounting procedures.

High school diploma or equivalent

None

Railroad Brake, Signal, and Switch Operators and Locomotive Firers Operate or monitor railroad track switches or locomotive instruments.

High school diploma or equivalent

None

Boilermakers assemble, install, maintain, and repair boilers, closed vats, and other large vessels or containers that hold liquids and gases.

High school diploma or equivalent

None

Power Distributors and Dispatchers control the systems that generate and distribute electric power.

High school diploma or equivalent

None

Power Plant Operators, Distributors, and Dispatchers control the systems that generate and distribute electric power.